"You want to keep changing and evolving the show," he said. "There's always the danger of falling into a rut and feeling formulaic, and we've tried to shy away from that. What we have found is a nice chemistry between our characters that works, but we always reserve the right to surprise the viewers with a twist or a killing."

Fellow exec Jonathan Nolan also revealed that he and the show's writers strive for a balance between self-contained episodes and longer story arcs, suggesting that such a format was "perfected with The X-Files".

"You can tune in and get a satisfying story with a beginning, middle and an end, but also another larger piece of the puzzle for fans watching every week," he explained. "So, we're setting up kind of a rogues' gallery of villains and setting them loose."